Driving mechanism for mattress-stitching machines



@ct. 14, 1924. J. W. DROLL DRIVING MECHANISM FOR MATTRESS STITCHING MACHINES Filed July l8, 1922 9 Sheets-Sheet 1 Jump Get. 14, 1924. I

. J.'W. DROLL DRIVING MECHANISM FOR MATTRESS STITCHING MACHiNES Filed July 18, 1922 9 Sheets-Sheet 2 11,511 FADE @ch 14 a 1924. Q

' J. W. DROLL DRIVING MECHANISM FOR MATTRESS STITCHING MACHINES Filed July 18, 1922 9 Sheets-Sheet 5 @mmm 1924. x "1,511,403

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DRIVING MECHANISM FOR MATTRESS STITCHING MACHINES Filed July 18 1922 9 Sheets-Sheet 5 9 Sheets-Sheet 6' Oct '14 1924. J. W. DROLL.

DRIVING MECHANISM FOR MATTRESS STITCHING MACHINES Filed July 18, 1922 Air Oct; 114 1924.

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J. w. pRoLL DRIVING MEGIMNISM FOR MATTRESS STITGHING MACHINES Filed July 18, 1922 9 Sheets-Sheet 9 I v M B 1% city of Chicago,

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Patented Oct. 14, 1924.

UNITED STATES PATENTiOl FlCE.

JOSEPH W. DROLL, OF CHICAGO, ILLINOIS, ASSIGNOR T0 DROLL PATENTS CORPORA- TION OF DELAWARE, A CORPORATION OF DELAWARE.

DRIVING MEOHAN ISM FOR MATTRESS-STITCHING MACHINES.

Application filed July 18,

To all whom it may concern: Be it known that I, Josnrerr citizen of the United States,

county of Cook, and State of Illinois, have invented a new and useful Improvement in a Driving Mechanism for Mattress-Stitching Machines, of which the following is a specification.

My invention relates to improvements in mattress stitching machines and particularly to improvements in driving mechanism adapted to intermittently move such machine along the edge of a mattress or other piece of upholstery at variable speed forming and sewing a roll thereon.

The primary object is to provide an improved driving mechanism for mattress stitching machines adapted to give increased smoothness and unity of action between associated parts.

Another object is to provide an improved driving means adapted to permit of vertical adjustment of the machine relative to the work without necessitating adjustment or alteration of the driving parts.

A further object is to provide improved means actuated by a cam in common with the roll forming and stitching mechanism for intermittently moving the machine relative to the mattress between stitches.

A further object is to provide improved means facilitatingthe adjustment of the amount of movement of the machine between stitches to regulate the length of stitch to be made.

A still further object is to provide improved means for automatically varying the speed of the machine.

I accomplish these and other objects by means of the device disclosed in the drawings forming a part of the present specification wherein like characters of reference are used to designate similar parts through out said specification and drawings, and in which:

Fig. 1 is a broken side elevation of my improved mattress stitching machine as mounted upon the edge of a work supporting table.

Fig. 2 is a front elevation of the machine as shown in Fig. 1, the movement of the machine along the edge of the table being shown in dotted lines.

Fig. 3 is an enlarged front elevation of a W. DRoLL, a

portion of the frame, parts being broken residing in the i 1922. Serial No. 575,814.

away and shown in section to disclose the driving mechanism.

Fig. 4 is a broken vertical section showing a side elevation of the parts disclosed in Fig. 3.

Fig. 5 is a broken horizontal section showing a plan view of the parts disclosed in Figs. 3 and 4. V

Fig. 6- is a broken transverse vertical section disclosing the clutch and gears for varying the speed of the machine.

Fig. 7 is a side elevation of the head of the machine with the cover removed and parts being broken away.

Fig. 8 is a similar view showing the movement of the driving members during a forward movement of the machine.

Fig. 9 is a similar View disclosing the means for adjusting the amount of forward movement for each revolution of the cam.

Fig. 10 is a broken front elevation'of a portion of the body of-the machine disclosing the means for adjusting the vertical position of the machine upon the supporting frame.

Fig. 11 is a'broken detail disclosing the means for locking the machine against further movement after each forward movement;

Referring to the drawings the numeral 1 is used to designate in general a supporting frame movably mounted upon the side of a work supporting table 2 by means of suitable castors 3 engaging a channel track 4 secured along the sides of the table. Upper guide rollers 6 engaging the track 4 and lower guide rollers 7 and 8 engaging opposite sides of a Channeltrack 9 secured upon the lower portion of table supporting legs llbguide the machine along the edge of the ta le.

A frame 12 is slidably mounted upon the same need herein 7 arms are, secured upon 3 ed to a shaft 17 The mechanism of said roll forming and sewing means have been made the subjects of co-pending applications, Serial No. 575,813 (Patent No. 1,503,351, July 29, 1924), and No. 575,812, filed July 18, 1922, and as they form no part of the present invention, no description of the be given other than that the forming means include a pair of packing needles 18 actuated by a pair of 19 in turn actuated by a groove 21 upon the cam 16, to one of which arms 19 the intermittent movement mechanism is connected as hereinafter .more fully described.

The machine is operated by means of a suitable motor 22 secured upon the lower portion of the frame 12 and operatively connected wit-ha source of electrical energy. The motor is connected, by means of a belt 23, with a pulley 24 secured upon the outer end of a sleeve 26 rotatably mounted upon a transverse drive shaft 27. The sleeve 26 carries upon its inner end a pinion 28 meshing with a gear 29 rotatably mounted upon a second shaft 31 arranged parallel to the shaft 27. A pinion .32 keyed upon the shaft 31 in spaced relation to the gear 29 meshes with a gear 33 rotatably mounted upon the drive shaft 27. Clutch members 34 and 36 the adjacent sides of the pinion 28 and the gear 33 respectively, said clutch members being arranged to be independently engaged by a sliding clutch member 37 feathered onto the drive shaft 27 The member 37 is normally held in engagement with the member 34. whereby the drive shaft 27 is driven directly from the pinion 32 in common with the sleeve 26.

When rounding the corners of the work supporting table 2 it has been found that the machine must be operated at a slower speed than while traversing the sides and ends of the table. To accomplish this the clutch member 37 is moved longitudinally along the shaft 27 into engagement with the clutch member 36 of the gear 33. The shaft 27 is now rotated by the gear 33 actuated by the pinion 32 upon the shaft 31 which is rotated by the pinion 28 engaging the gear 29, the ratio of the gears being adaptgive the desired reduction in speed. The clutch member 37 is shifted by means of a forked member 38 engaging a groove 39 formed upon the member 37. The member 38 is pivoted upon a pin 40 secured upon the frame 12 and is provided with an extension 41 engaged by a slot 42 longitudinally disposed within a member 43 connected between a pair of bell cranks 44 and 46 pivotally mounted upon the inner side of the frame 1'. A lever 47, pivotally mounted at its approximate center upon.

the outer side of the frame 1, has one end thereof connected with the cranks 44 and Game 53 are secured between successive stitches,

46, by means of a link 48, extending upwardly through a suitable opening in the frame. The other end of the lever 47 has a link 50 connected thereto, said link 50 having a member 49 adjustably secured thereto by means of nuts 51. sion 52 formed upon the front of the frame 1 is apertured to slidably engage the member 49 and guide the same, the upper end of said member 49 being held in a position immediately below the edge of the table 2. upon the under side of the table along the corners thereon to engage the upper end of the member 49 when moved thereunder by the movement o the machine along the edge of the table as hereinafter described, said cams 53 being arranged to depress said member 49 during the period of timerequired for the machine to pass around the corner of the table. The depression of the member 49 causes the link 50 to move the lever 47 about its pivot, the link 48 being thereby moved to turn the cranks 44 and 46 about their pivots, said movement of the cranks in turn causing the slotted member 43 to be shifted transversely and the forked member 38 thereby pivotally moved to throw the clutch member 37 into engagement with the low speed clutch member 36. A spring 54 has one end thereof connected to the lever 47 and the other end anchored to the frame 1 in such manner as to normally maintain the clutch member 37 in engagement-with the clutch 34 when the sliding member 49' is not engaged by one of the cams 53.

The drive shaft is provided with a bevel gear 56 secured thereon and meshing with a bevel gear 57 secured upon the lower end of a sleeve 58 feathered upon the lower end of a shaft 59. The sleeve 58 is mounted at its lower end within a bearing 61 pivotally secured to the shaft 27 to permit pivotal movement of the sleeve 58 relative to the shaft 27 without moving the gear 57 out of engagement with the gear 56. The shaft 59 is provided at its upper end with a similar bearing 62 pivotally mounted upon a shaft 63 within the head 13 of the machine. pinion 64 mounted upon the shaft 63 is driven by a'bevel gear 65 upon the upper end of the shaft 59, said pinion 64 belng arranged in .meshing engagement with teeth formed upon the periphery of the cam 16 whereby said cam is rotated uponits shaft 17.

As the above mentioned roll forming and sewing mechanism are actuated by the rotation of the cam 16 to form a roll and securely stitch the same in place along the edge of the mattress, the machine is moved intermittently along the edge of the table said movement of the machine being accomplished in the following manner.

An exten- A gear 66 is mountedupon the frame 1 in meshing relation with a rack 67 secured along the edge of the table 2 said gear 66 being actuated by an elongated pinion 68 mounted upon a shaft 69 connected by a flexible connection 71 to a sleeve 72 feathered upon the lower end of a shaft 73 the upper end of which is mounted within a bearing 75 pivotally suspended upon a shaft 74. A bevel gear 76 is secured upon the upper end of the shaft 73 in meshing relation with a similar bevel gear 77 secured in connection with a pinion 78 rotatably mounted upon the shaft 74.

The shaft 74 is mounted between the prongs of a fork member 79 pivotally upon a shaft 81 within the head 13 of the machine, the inner prong of said member 79 being connected by'a link 82 to one of the arms 19 of the roll forming mechanism above mentioned whereby a slight oscillating movement is imparted to said forked member 79 when the packing needles 18 are moved to engage and disengage the mattress in the manner fully described in my copending application above referred to.

A segment gear 83 pivotally mounted upon a shaft 84 within the head 13 is connected by a link 86 to one end of an arm 87, the other end of which is connected to a crank 88 carried by a shaft 89 arranged to be oscillated by an arm 91 secured thereto and carrying a cam roller 93 engaging the cam groove 21 by which the packing needles are actuated. A longitudinally disposed slot 94 is formed at the approximate center of the arm 87, said slot being arranged to engage a pivot pin 96 secured upon a member 97 pivotally mounted at one end thereof upon the shaft 84. The other end of the member 97 is provided with gear teeth 98 arranged to be engaged by the teeth 99 of a pivotally mounted adjusting member 101 mounted adjacent thereto whereby the end of member 97 may be raised or lowered to vary the position of the pin 96 within the slot 94 for a purpose hereinafter more fully described.

When the arms 19 are moved to advance the packing needles 18* into the edge of a mattress the link 82 causes the forked member 79 to move the pinion 78 out of mesh with the segment gear 83 and into engagement with a locking rack 102 secured adjacent thereto, thus preventing rotation of the pinion and the members actuated thereby and locking the machine against movement along the edge of the table.

As the needles 18 are moved by the arms 19 to disengage the mattress, the forked member is moved pivotally about the shaft 81 to carry the pinion 78 into meshing engagement with the segment gear'83, and out of engagementwith the locking rack 102. Immediately after said movement a rise in the cam groove 21 engages the roller 93, the 4 arm 91 and the crank 88 being partially rotated. The movement of the crank 88 causes the arm 87 to be pivoted about the pin 96, and the link thereby caused to move the segment gear 83 pivotally about its shaft 84 to rotate the pinion 78, which rotation is in turn imparted by the above described connections to the gear 66 and the machine thereby moved along the edge of the table 2. In Fig. 8 of the drawings the movement of the several members above described is shown, the position before the withdrawal of the needles being shown in dotted lines, and the position existing when-the forward movement is approximately half completed, disclosed in full lines. The direction of movement of the various members is indicated in each case by an arrow.

The distance advanced along the edge of the table is adjusted by means of the member 101 as shown in Fig. 9 of the drawings. By moving the member 101 to raise or lower the pin 96 within the slot 94, the ratio between the lengths of the arm 87 upon opposite sides of said pin may be varied. Thus,

when the pin is within the lower portion of the slot, as shown in full lines, the amount of movement at the upper end of the arm 87 will be much greater than when the pin is positioned within the upper portion of the.

slot, as shown in dotted lines. This adjustment permits the amount of movement of the machine and hence the length of stitch to be adjusted to meet the requirement of different styles and grades of work.

In order that the machine may be moved manually along the edge of the table 2, the shaft 69 carrying the pinion 68 is slidably mounted therethrough, a lug 103 on the upper portion of said shaft being arranged to engage the pinion to rotate the same. The shaft 69 is normally held in operative engagement with the pinion 68 by means of a spring 104 as best shown in Fig. 4 of the drawings. When it is desired to release the pinion 68 from engagement with the shaft to permit free rotationof said pinion as the machine is moved along the table, a lever 106 secured upon a shaft 107 is moved to lift the shaft 69 against the pressure of the spring 104 by means of an operating lever 108 secured upon the outer end of the shaft 107 as shown in dotted lines in Fig. 4.

The frame 12 is slidably mounted upon the frame 1 and held in vertical adjustment thereon by means of a screw 111 rotatably secured upon the frame 12 and threaded through an extension 112 upon the frame 1. The screw 111 is provided with a bevel gear 113 meshing With a gear 114 arranged to be rotated by a hand wheel 116 as shown in Fig. 10 of the drawings, whereby the screw may be turned to move the frame upwardly or downwardly with respect to the support- 66. The sleeves 58 and 72 are feathered onto their respective shafts and the pivotal bearings described in connection therewith are arranged to permit vertical movement of the frame without interfering in any manner with the driving connection, the shafts being advanced into or receded from the sleeves in accordance with the movement of the frame 12. The pivotal bearings permit of the necessary pivotal movement occasioned by such adjustment and also for the pivotal adjustment of the head 13 relative to the frame 12. In this manner the driving connections require no alteration or adjustment when the vertical height or inclination of the machine is varied for different characters or grades of work. The slot 42 is similarly provided for the purpose of maintaining engagement with the extension 11 for varying the speed of the machine regardless of the vertical position of the frame 12 relative to the supporting frame 1.

The construction above described afiords a strong and efficient machine in which the several moving parts are so connected and actuated b a common cam asto afford extreme uni 'ormity of work and smoothness of action. 1

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a mattress stitching machine adapted for movement along the edge of a work supporting table; a drive shaft; a motor connected to said drive shaft; a cam; and a connecting shaft connected between the drive shaft and the cam, said connecting shaft being adapted for pivotal and slidable movement to permit adjustment of the cam relative to the drive shaft; a meshing gear and rack connected between the shaft and the work supporting table for intermittently moving the machine along the edge of said table.

2. In a mattress stitching machine adapted. for movement along the edge of a work supporting table; a drive shaft; a motor connected to said drive shaft; a cam; and a connecting shaft operatively connected between the drive shaft and the cam, said con necting shaft comprising telescoping sections adapted to permit vertical adjustment of the cam relative to the drive shaft; a meshing gear and rack connected between the shaft and the work supporting table for intermittently moving the machine along the edge of said table.

3. In a mattress stitching machine adapted for movement along the edge of a table; a drive shaft; a motor connected to said drive shaft; a. cam; and a connecting shaft operatively connected between said drive shaft and the cam, said connecting shaft comprising a pair of telescoping sections pivotally mounted at their outer ends to permit vertical and pivotal adjustment of the cam relative to the drive shaft; a meshing gear and rack connected between the shaft and the work supporting table for intermittently moving the machine along the edge of said table.

4. In a mattress stitching machine adapted for movement along the edge of a table: 'a drive shaft; a motor connected to said drive shaft; a cam; a connecting shaft operatively connected between said drive shaft and the cam, said connecting shaft comprising a pair of telescoping sections pivotally mounted at their outer ends to permit vertical and pivotal adjustment of the cam relative to the drive shaft; a meshing gear and rack connected between the shaft and the Work supporting table for intermittently moving the machine along the edge of said table, and means mounted in connection with the drive shaft forvarying the speed at which the same is rotated.

5. In a mattress stitching machine adapted for movement along'the edge of a work supporting table; a drive shaft; a sleeve rotatably mounted upon the drive shaft; a motor connected with said sleeve for rotating the same; a gear secured upon the sleeve; a gear of a difierent diameter rotatably mounted upon the drive shaft in spaced relation to said first mentioned gear; a clutch feathered upon the drive shaft between the'gears and adapted for engagement with either of said gears; a second shaft mounted in parallel relation to the drive shaft; gears secured upon said second shaft in meshing relation with the gears upon the sleeve and the drive shaft; means for normally holding the clutch in engagement with the gear upon the sleeve whereby'the drive shaft is rotated directly with the sleeve; and means for shifting the clutch to engage the gearupon the drive shaft whereby said drive shaft is driven at a different speed through the pairs of mesh ing gears.

6. A mattress stitching machine adapted for mounting upon the edge of a work supporting table; a rack secured upon the edge of the table; a gear mounted upon the machine in meshing relation with said rack; a power driven cam mounted within the ma' chine, said cam being arranged to actuate the stitch forming mechanism of said machine; and means actuated by said cam and connected to said gear for rotating the same to intermittently move the machine along the rack upon the edge of the table.

7. A mattress stitching machine including a cam arranged to actuate a roll form- 'ing and stitching mechanism, said machine being adapted for mounting upon the edge of a work supporting table; a rack secured upon the edge of the table; a gear mounted upon the machine in meshing relation with the rack; a' pinion meshing with said gear; and means connecting the cam and the pinion for intermittently rotating said pinion in timed relation to the movements of the roll forming and stitching mechanism to move'the machine intermittently along the edge of the table.

8. A mattress stitching machine includ ing a cam arranged to actuate a roll forming and stitching mechanism; said machine' upon the edge being adapted for mounting of a work supporting table; a rack secured along the edge of the table; a gear mounted upon the machine in meshing relation with the rack; a pinion meshing with said gear; a shaft flexibly connected at one end thereof to the pinion and at the other end pivotally mounted in connection with the cam and arranged to be actuated thereby in timed relation to the roll forming and stitching mechanism for intermittently moving the machine along the rack upon the edge of the table.

9. A mattress stitching machine including a cam arranged to actuate a roll forming and stitching mechanism, said machine being adapted for mounting upon the-edge of a work supporting table; a rack secured along the edge of the table; a gear mounted upon the machine in meshing relation with the rack; a pinion meshing with said ear; a shaft flexibly connected at one end t ereof to the pinion and at the other. end pivotally mounted in connection with the cam and arranged to be actuated thereby in timed relation to the. roll forming and stitching mechanism for intermittently moving the machine along rack upon the edge of the table; and means for disengaging said shaft from the pinion to permit movement of the machine along the edge of the table independently from movement of the cam.

10. A mattress stitching machine including a cam arranged to actuate a roll forming and stitching mechanism; said machine being adapted for mounting upon the edge of a Work supporting table; a rack secured along the edge of said table; a segment gear piyotally mounted adjacent the cam; means connecting the segment gear and the cam for oscillating said gear; and a shaft connected by means of gears between said segment gear and the rack for intermittently moving said machine along the edge of the table in timed relation to the operation of the roll forming and stitching mechanism by the cam.

11. A mattress stitching machine including a cam arranged to actuate a roll formmg and stitching mechanism, said machine being adaptedfor mounting upon the edge of a work supporting table; a rack secured along the edge of said table; asegment gear pivotally mounted adjacent the cam; means connecting the segment gear and the cam for oscillating said gear; a shaft connected by means of gears between said segment gear and the rack for intermittently moving said machine along the edge of the table in timed relation to the operation of the roll forming and stitching mechanism by the cam; and means for adjusting the throw of the segment gear to regulate the amount of movement of the machine for each oscil lation of said segment gear.

12. A mattress stitching machine including a cam arranged to actuate a roll forming and stitching mechanism, said machine being adapted for mounting upon the edge of a work supporting table; a rack secured along the edge of the table; a segment gear pivotally mounted adjacent the cam; means connecting the segment gear and the cam for oscillating said gear; a shaft connected at its lower end with gears arranged to engage the rack upon the edge of the table; gears connected upon the upper end of the shaft; and means for moving said upper gears into engagement with the segment gear during movement thereof in one direction and out of engagement during the return movement in the opposite direction whereby the machine is intermittently moved along the edge of the table. i

13. A mattress stitching machine including a cam arranged to actuate a roll forming and stitching mechanism, said machine being adapted for mounting upon the edge of a work supporting table; a rack secured along the edge of the table; a segment gear pivotally mounted adjacent the cam; means connecting the segment gear and the cam for oscillating said gear; a shaft connected at its lower end with gears arranged to engage the rack upon the edge of the table; gears connected upon the upper end of the shaft; means for moving said upper gears into engagement with the segment gear during a movement thereof in one direction and out of engagement during the return movement in the opposite'direction whereby the machine is intermittently moved along the edge of the table; and means arranged to engage the said upper gears when moved out of engagement'with the segment gear to prevent further rotation thereof thereby locking the machine against further movement along the edge of theta-ble during said return movement of the segment gear.

14. A mattress stitching machine including a cam arranged to actuate roll forming and stitching mechanism, said machine being adapted for mounting upon the edge of a work supporting table; a rack secured along the edge of the table; a segment gear pivotoscillating said gear;

ally mounted adjacent the cam; means conneeting the segment gear and the cam for a shaft comprising a pair of telescoping sections adapted to permit longitudinal. adjustment of the length of said shaft; gears mounted upon the ma.-

' chine in meshing relation with the rack upon the edge of the table; a flexible joint connecting the lower section of'the shaft with said gears for imparting rotation thereto; gears connected to the upper portion of the shaft, said gears and upper shaft portion being pivotally suspended. adjacent the segment gear; and means for moving said gears into and out of engagement with the segment gear to intermittently rotate said shaft whereby the machine may be intermittently moved along the edge of the table in timed relation to the operation of the roll forming and stitching mechanism.

15. In a mattress stitching machine adapted for mounting upon the edge of a work supporting table and including a cam arranged to actuate a roll forming and stitchg ing mechanism, a segment gear pivotally mounted adjacent said cam; an arm having one end thereof pivotally mounted adjacent said segment gear; a pivot pin secured upon said arm; an actuating lever having a longitudinally disposed slot engaging the pivot pin; meansconnecting one end of said actuating lever with the cam for oscillating said lever about saidpivotpin; a link connecting the other end of the actuating lever with the segment gear for oscillating said and means arranged to be engaged by said segment during one portion of each oscillation thereof for intermittently moving said machine along the edge of the work supporting table.

16. In a mattrem stitching machine adapted for mounting upon the edge of a work stitching mechanism supporting table and includinga cam arranged to actuate a roll forming and stitch-- ing mechanism, a segment gear pivotally mounted adjacent 'said'cam; an arm having one end thereof pivotally mounted adjacent said segment gear; a pivot pin secured upon said arm; an actuating lever having a longitudinally disposed slot'engaging the pivot pin; means connecting one end of said actuating lever with the cam for oscillating said lever about said pivot pin; a link connecting the other end of the actuating lever witlrthe segment gear for oscillating said gear; means arranged to be engaged by said segment during one portion of each oscillation thereof for intermittently moving said ma0l1ine along the edge of the work supporting table; and means pivotally moving the arm tovary the position of the pivot pin within the slot whereby the throw at the upper end of the actuating lever may be varied to adjust the amount of movement caused by each oscillation of the segment ear. A

17 A mattress stitching machine adapted for mounting upon the edge of a work supporting table, said machine including a cam arranged to actuate roll forming and stitching mechanism; a segment gear mounted ad-," jacent said cam; means connecting said segment gear with the cam for imparting an oscillating movement to the gear; and means connected between the segment gear and the Work supporting table for intermittently moving the machine along the edge of said table in time relation to the movement of the cam and the roll forming and associated therewith.

In witness whereof I hereunto set my signature. I

JOSEPH W. DROLL. 

